Drill.



H. R. DECKER.

mm1. APPLICATION FILED APR.'3. 19H.

Patented Aug. 31, 1915.

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' T0 alliwhom itwta'e/l'concern: `1

HARRY a. DECKER, or nous'ron, rnXAs/ Darm..

l Speeic'ation of Letters Patent. u

Patented dug. 31, 1915.

Application filed April 3, 19,11. Serial No. 618,664.

. citizen of the United States, residing atimprovements in drills.

Houstom in the county ofl Harris and State of Texas, have invented certain new and useful Improvements in Drills, of which the following is a specification.

.My invention relates to new and useful` The object of the invention is to provide a device of the character `described having na suitable cutting point and being also provided with side cutters, arranged opposite, or,l in staggered relation, to each other around the drill head,each cutter projecting slightly farther from the head l'than the cut-ter. there- `beneath and designed to gradually enlarge f and thoroughly rean out the borelmade byl the cutting point of the drill. These side cutters are rotatably mounted^ in suitable bearings of the drill head andthe invention further comprehends a method for lubricating said bearings as well asa means whereby `water ,is introducedto the drill point for the purposel of iushing the bore.

With the aboye and other objects in view v my invention has particular relation to cer'- tain novel features ofv construction, operation and arrangement ofl parts, ian example of which is given in this specification and illustrated inthe accompanying drawings,

section, of the drill attached to a drill stem.

. A etv the numeral 7 refersto the drill head which,` 1 I 'l tion from the head 7 thanthe cutter imme- 2 is an end view'. of the drill head L viewed from above. Fig. 3 is a centralsec# tonalview of one of the side cutters.' Fig.

'4 is an Vouter end view thereof. l Fig. 5 is a- 7@ sideelevation of the`cutter bearing member.

Fig. 6 isa plan view ofthe cutter cap, and Fig. 7 is a sectional view of ahmodiied form of the drillfhead having-laterally projecting bosses in which the side cutters are anchored.

vReferring nowImorepartic-larly to the.'

drawing, wherein like numerals of reference designate similar parts in each of the figures,

\thre'aded lower end ofthe drill stern,- 48; The other end of this head hasl an interiorly threaded'r'ecessinto which the shank 9 of the drill point 10.screws. i 'llhe head 1s provided" waterpas..

. l sageways 11 and 12 located on opposite sides Be it knownthat I, HARRY R. DECKER, a

of the vaxial` center thereof and communiand provided for the purpose of conducting the flushing iiuid from the drill stem to the drill point.

rlhe drill head 7 carries a plurality of toothed rotatable side cutters 13. These cutters are substantially conical in shape and are located in sockets provided inthe sides of the head. Said sockets are located on opposite sides 4of said head and 'preferably in staggered relation to each other and the cutters are secured therein by means vof stud bolts 14 which pass through said cutters, as shownin Fig. 3, and screw into'l threaded recesses which form extensions of said sockets in said head. The cutters are hollow and the stud bolts have' enlarged heads which fit nicely within the hollow portions, said heads being conical in shape and conforming to theshape .of the hollow'i-- terior of the cutters and thus holdingsaid cutters firmly in place but permitting the rotation thereof on said bolt-s. When the bolt is screwed into position its head is completely. buried inthe cutter and the cap 15 is then screwed into the outer end vof the cutter soas to completely protect said bolt, and the'bearing between the bolt and cutter, from` grit and v'sandzand other foreign matr ter. rFhe rim of'thefouter end of the cutter is beveledand forms a face,'substantially at ight yangles to theconical shaped side of he cutter. The operative sides and end' of thefcutter are corrugated or Atoothed so as to more readily cut and wearaway therebstruction to be removed thereby. "These cutters are so set in their sockets that the sides thereof operating against the obstruction to be removed will extendcat right angles to .4 the head 7 and thefends thereof will operate against the side fof the bore and reaml thev same out and keep it perfectly roundN and smooth. 1 i.

Each cutter has a greaterlateral projecdiately therebeneath so that the bore made 'by the point 10 will be gradually enlarged by each of said .side cutter, as shown in Fig. 1; This result may be attained by the use of different' sized cutters,y or by burying thev the headmaylbeprovided with laterally exi tending lwhich the side cutters 131may I veterof the u as `showin in Figf'?, in' beanchored, inwhich case those above will project `out bosses 20,

. varther than the ones immediately therebeneath, for the purpose hereinbefore speci- {ied,'and by the use of said bosses the dian'i-` h'eadpropermay be greatly reduced', th1's'allow1 ng more space between the drill head andthe sides of the bore and lessening theliability of the drill to 'become locatedfoil passageway'16k which extends cap, as shown lnFig. 3.'

- oil from from the upper endthere'of alon the axial .line of said head and stops'sh rt of lthe lower end thereof. Side passageways 17 communicate with passageway 16 and' also 'extending passageways which lead entirely through the stud bolts 14 and communicate with oil chambers formed-between the outer end` of said bolts .and the I. inner sides of caps '15. 1 This chamber is formed by concavingthe underside of said YAs'shown in Fig. 1,*the-upper end of-head 7 is provided with an interiorly threaded recess, which is centrallyy located andwhich is designed to receive thelwer exteriorly threaded end of oil pipe 181- This pipe isprovided tofre'tain a lubricating voil and when filledV the plunger 19 is inserted therein. -The Water pressure-Withinl drill stem 84` operating against the plungerl19 forcesthe its `receptacle through passageways 16 and 17 and into the oil chamber formed i b'etyveen'the head of bolt 14 and cap 15',- from which the .lubricating-fiuidiinds itswiy to i thebearingbetween the cutter 13 and its and wane drilling,

, lps said bea-ring thoroughlylubricated.. f -"l hi s,ldevice is'to be used as a rotary drill it is' obvious that the welght ef .the drill stem will be borne by the point and the conical'shaped side cutvter`s'-, thus relievingI said side cutters of a portion of 'the' yweight and distributing vsaid f weight between the drill point and eacho'f tending therethrough and I the'slde cutters Whatlclaimim; 1.' In a deviceof the character described form'inga bearfor said cutting member and a detacha le cap, secured'n the exposed end ofv saidcuttlng member and inclosingsaid bearin 2. In a device of the lcharacter described 'a' rotatable,v cutting `member .having `two toothed operative'faces, a supporting''mem- Itending bearing toothedyand through which f extend, the toothe faces against the bore 'being formed exoperation, .at approximately right'.

vbearing for said cutting member and'a detachable cap having its under face concaved, secured in the-exposed end of said cutting member and inclosing said bearing. e

' 3.-'In a device of the character described a rotatable cutting -member having its operative face toothed, a supporting member extending therethrough and forming a beari, ing for said cutting member and a detach; able cap having its under face concaved, secured inthe exposed end oi said cutting member and inclosing said bearing.

4. In a device of the character-described a cone shaped cutting member and a support therefor, a bearing member upon which f the same is rotatably'mountediand which 'projectsfrom the apex of the cutting member and engages withsaid support, and a extending approximately at rightangles to the axis of the head, and sultable bearing' members-securedto thehead onwhich members the 'cutters rotate. Y

a cutting point carried by the lower end thereof, approximately frusto conical shaped members mounted on the 'sides of c. A dan including-a. suitable headj and' said head, whose axes extend from the head at approximately a 45 angle, and whose unde: faces in operation extend from the head at approximately a 907 angle, to the axis of the head, and lbearing members engaging with the head on which membersthe respectivecutters rotate.' L 7 In a drill, a drill'fhead and laterally exmembers carried thereby, and arranged on opposite sides thereof, and projecting at unequal distances 1 therefrom, approximately frusto conical shaped rotatable side cutters having their operative faces the res ective bearing-members operating A tending in angles to the axis of the In testimony nameto this specification in tle presence of two subscribing',witnessesv f HARRY R. DECKER. Witnesses:

J. Wyman; A, TOMlfiHNs,

head.

whereof lI have signed my 

